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Algal Biomass Conversion - Department of Energy PDF

39 Pages·2015·2.18 MB·English
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BETO 2015 Project Peer Review Algal Biomass Conversion WBS 1.3.4.201 Philip T. Pienkos National Renewable Energy Laboratory March 24th, 2015 This presentation does not contain any proprietary, confidential, or otherwise restricted information NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Goal Statement Reduce algal biofuel production cost by developing advanced process options for the conversion of algal biomass into biofuels and bioproducts based on the three major biomass components: lipids, carbohydrates, and proteins. 2 Quad Chart Overview Timeline Barriers • Project start date: 1/30/13 Barriers addressed • Project end date: 9/30/17 – AFt-H. Overall Integration and Scale- Up • Percent complete: 46% – AFt-I. Algal Feedstock Preprocessing • Existing Project – Aft-J. Resource Recapture and Recycle Budget Partners • Partners Total Costs FY 13 FY 14 Total Planned FY10 –FY12 Costs Costs Funding (FY 15- • ASU for biomass supply Project End Date • SNL for fermentation of protein • Other interactions/collaborations DOE $0 $17,597 $626,735 $2,454,891 • NREL Algal Biomass Valorization and Funded Techno-Economic Analysis projects • ANL for LCA modeling • Algix for evaluation of protein • Non-technical project management partners • None 3 1 - Project Overview • Work began in FY13 to reduce biofuel production cost through biomass fractionation and component valorization. • Process evaluated for biomass produced in outdoor cultivation systems at ASU • Scenedesmus acutus (LRB-AP 0401) • Chlorella vulgaris (LRB-AZ 1201) • Nannochloropsis granulata (CMP535 aka LRB-MP-0209 ) • Additional cost savings can be achieved by replacing parallel processing with sequential processing. • Biomass conversion process has become the framework for the Algal Lipid Upgrading (ALU) Design Case and State of Technology. 4 2 – Approach (Technical) • Project plan has four components Development of pretreatment process for hydrolysis of algal • carbohydrates and release of monomeric sugars Development of extraction process for efficient recovery of fuel-grade • lipids Demonstration of fermentation processes for valorization of algal • sugars Development of lipid upgrading process for evaluation of feedstock • quality and feedback with upstream processes • Scale processes from 10 gram to 100 kg. • Interact with TEA project for guidance on technical plan and to provide data for modeling • Interact with Algal Biomass Valorization project for identification of novel coproduct strategies 5 2 – Approach (Management) • Critical Success Factors o Extraction lipid yield o Extraction CAPEX o Hydrotreating CAPEX o Solids content in slurry o Pretreatment glucose yields • Top potential challenges o Low cost scalable extraction process o High sugar yields with minimal degradation products o Lipid upgrading to achieve product specifications (diesel vs diesel blendstock) • Management Structure o Pretreatment and extraction (Nick Nagle) o Lipid upgrading (Bob McCormick) o Weekly progress update meetings o Quarterly milestones to track progress 6 3 – Technical Accomplishments/ Progress/Results: Potential Fuel Yields From Algal Biomass 7 Potential Cost Savings from Fractionation Process 8 Algal Lipids and Carbohydrates NC: Laminarin Element HL CZ HC CZ HL SD HC SD HL NC CZ: Starch SD: Glucomannan Carbon 76.83 77.42 77.53 76.61 76.87 Hydrogen 11.74 11.54 12.00 11.91 11.77 Nitrogen 0.04 0.05 0.03 0.10 0.09 Oxygen 11.86 11.37 11.04 11.93 11.96 Sulfur 0.004 0.006 0.005 0.026 0.036 Phosphorus <0.001 <0.001 <0.001 0.001 0.039 9 Hydrodeoxygenation • Algal oil diluted to 25% in hexane • Liquid product is primarily n-paraffin • Oxygen removal is primarily through decarbon/xylation 10

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Reduce algal biofuel production cost by developing advanced process options for the conversion of algal biomass into biofuels and bioproducts based
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